/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraSystem.h
Adds a new emitter handle to this System. The new handle exposes an Instance value which is a copy of the original asset.
[FNiagaraEmitterHandle](API\Plugins\Niagara\FNiagaraEmitterHandle) AddEmitterHandle ( [UNiagaraEmitter](API\Plugins\Niagara\UNiagaraEmitter) & SourceEmitter, [FName](API\Runtime\Core\UObject\FName) EmitterName, [FGuid](API\Runtime\Core\Misc\FGuid) EmitterVersion )